105 lines
3.7 KiB
Python
105 lines
3.7 KiB
Python
import frappe, re
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from frappe import _
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from frappe.utils import cstr
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from erpnext.regional.india import states, state_numbers
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from erpnext.controllers.taxes_and_totals import get_itemised_tax, get_itemised_taxable_amount
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def validate_gstin_for_india(doc, method):
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if not hasattr(doc, 'gstin'):
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return
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doc.gstin = doc.gstin.upper().strip()
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if not doc.gstin or doc.gstin == 'NA':
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return
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if len(doc.gstin) != 15:
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frappe.throw(_("Invalid GSTIN! A GSTIN must have 15 characters."))
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p = re.compile("^[0-9]{2}[A-Z]{4}[0-9A-Z]{1}[0-9]{4}[A-Z]{1}[1-9A-Z]{1}[1-9A-Z]{1}[0-9A-Z]{1}$")
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if not p.match(doc.gstin):
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frappe.throw(_("Invalid GSTIN! The input you've entered doesn't match the format of GSTIN."))
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validate_gstin_check_digit(doc.gstin)
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if not doc.gst_state and doc.state:
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state = doc.state.lower()
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states_lowercase = {s.lower():s for s in states}
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if state in states_lowercase:
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doc.gst_state = states_lowercase[state]
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else:
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return
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doc.gst_state_number = state_numbers[doc.gst_state]
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if doc.gst_state_number != doc.gstin[:2]:
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frappe.throw(_("Invalid GSTIN! First 2 digits of GSTIN should match with State number {0}.")
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.format(doc.gst_state_number))
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def validate_gstin_check_digit(gstin):
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''' Function to validate the check digit of the GSTIN.'''
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factor = 1
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total = 0
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code_point_chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ'
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mod = len(code_point_chars)
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input_chars = gstin[:-1]
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for char in input_chars:
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digit = factor * code_point_chars.find(char)
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digit = (digit // mod) + (digit % mod)
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total += digit
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factor = 2 if factor == 1 else 1
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if gstin[-1] != code_point_chars[((mod - (total % mod)) % mod)]:
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frappe.throw(_("Invalid GSTIN! The check digit validation has failed. " +
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"Please ensure you've typed the GSTIN correctly."))
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def get_itemised_tax_breakup_header(item_doctype, tax_accounts):
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if frappe.get_meta(item_doctype).has_field('gst_hsn_code'):
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return [_("HSN/SAC"), _("Taxable Amount")] + tax_accounts
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else:
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return [_("Item"), _("Taxable Amount")] + tax_accounts
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def get_itemised_tax_breakup_data(doc):
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itemised_tax = get_itemised_tax(doc.taxes)
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itemised_taxable_amount = get_itemised_taxable_amount(doc.items)
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if not frappe.get_meta(doc.doctype + " Item").has_field('gst_hsn_code'):
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return itemised_tax, itemised_taxable_amount
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item_hsn_map = frappe._dict()
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for d in doc.items:
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item_hsn_map.setdefault(d.item_code or d.item_name, d.get("gst_hsn_code"))
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hsn_tax = {}
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for item, taxes in itemised_tax.items():
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hsn_code = item_hsn_map.get(item)
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hsn_tax.setdefault(hsn_code, frappe._dict())
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for tax_account, tax_detail in taxes.items():
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hsn_tax[hsn_code].setdefault(tax_account, {"tax_rate": 0, "tax_amount": 0})
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hsn_tax[hsn_code][tax_account]["tax_rate"] = tax_detail.get("tax_rate")
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hsn_tax[hsn_code][tax_account]["tax_amount"] += tax_detail.get("tax_amount")
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# set taxable amount
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hsn_taxable_amount = frappe._dict()
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for item, taxable_amount in itemised_taxable_amount.items():
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hsn_code = item_hsn_map.get(item)
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hsn_taxable_amount.setdefault(hsn_code, 0)
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hsn_taxable_amount[hsn_code] += itemised_taxable_amount.get(item)
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return hsn_tax, hsn_taxable_amount
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def set_place_of_supply(doc, method):
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if not frappe.get_meta('Address').has_field('gst_state'): return
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if doc.doctype in ("Sales Invoice", "Delivery Note"):
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address_name = doc.shipping_address_name or doc.customer_address
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elif doc.doctype == "Purchase Invoice":
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address_name = doc.shipping_address or doc.supplier_address
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if address_name:
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address = frappe.db.get_value("Address", address_name, ["gst_state", "gst_state_number"], as_dict=1)
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doc.place_of_supply = cstr(address.gst_state_number) + "-" + cstr(address.gst_state)
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# don't remove this function it is used in tests
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def test_method():
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'''test function'''
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return 'overridden'
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